Cooking-stove



D. JOHNSTON.

Cooking Stove.- No. 6,700. Patented Sept. 4, 1849.

UNITED STATES PATENT OFFICE.

DAVID JOHNSTON, OF AMSTERDAM, OI-IIO.

COOKING-STOVE.

Specification of Letters Patent No. 6,700, dated September 4, 1849.

To all whom it may concern Be it known that I, DAVID JOHNSTON, of thetown of Amsterdam, in the county of Jefferson and State of Ohio, haveinvented and made a new and useful Improvement in Cooking-Stoves; and Ido hereby declare that the following is a full and exact description.

The front of my stove is constructed after the form of a commonfireplace but not so as to have any flare in the sides or 'jambs a. Thelower end of the inclined part. of the back 6 or back wall of thisfireplace is made so as to be shifted from back to front as shown in thecross section when cooking is wished to be done. The upper end of whichin the meantime only slides up and down against the top part to which itis attached and confined to lean and slide against by the use of twopins 0. Behind the fireplace is the cooking department, the front part(Z of the lid or top of which is made and hinged like that of a trapdoor and stands up behind and against the back of the back wall so thatwhen the back wall 7) is shifted to the front for cooking to be donethis trap door or lid then falls down and fills up the space and thatdirectly over the hottest part of the fire as represented by the redlines in Fig. 2. Through the openings of which (trap lid or door (Z) theboilers are placed and cooking done. The change thus made of the backwall stops the chimney flue e, but opens the flue f to the cookingdepartment. IVhere the draft takes the flame smoke and heat directlyunder the second set of cooking utensils at g and around the oven orbaker h, from which the smoke goes off by another pipe into the chimneyas usual or otherwise by a crooked pipe 2' into the right hand side ofmy fireplace chimney where there is a space r to receive it near thetop.

The back 9 or back of my grate must be arranged so as to give properspace for the draft to the cooking department and make a good shape tofit to the moving back wall of the chimney. The two sides 76 of thisgrate to be higher than the front Z to give air on some occasions bysupporting up the back Wall to a suitable height and also to preservethe side of the j ambs from burning and again to rest and slide theshifting back wall on until it slides near the back of the grate when itsuddenly falls off and wedges against the back of the back wall of thegrate at k. When all the heat is required to be used for baking andcooking the front may be closed by folding doors m, or by a slidingfront door to slide in grooves which doors can be raised above orlowered in front of the fireplace as occasion may require.

The general complaint against cooking stoves of the various kindsappears to be that of not affording the comfort and convenience of lightand heat as would be desirable that they should do. This objection Ithink I have forever silenced by my improvement. If you wish a good fireyou can with convenience make one and then have all the advantages oflight and heat you could desire.

Cooking in a private family requires but a small part of the time saythree hours in the twenty four and when it has to be done the fire isalready made and stove warm. Nothing to do but shift your back wall tothe front the trap door falls itself and you are ready in an instant forcooking. Or again move it only half way forward and you reserve a partof the fire to set at with light and heat and the balance goes to thecooking department.

My improvement may be easily attached to many of the different patternsof stoves now in use by a slightalteration in their construction, butnone better I think than the one represented.

My movable back wall 6, must be all its height of equal width and soshaped as to make a good shaped fireplace at the back. And also whenremoved to the front to come flush up to the mantle yet have space abovesufiicient to receive the pipe and smoke from the coo-king department.It must be made thick where the fire strikes it the hardest and alsohave a projection 11, on the back part of the trap (Z to rest on whencooking has to be done. The chimney also must maintain its width to thetop measuring say from 16 to 28 inches in helght from its grate where asuitable top 0 is fastened and made in a proper shape to bear the pipe 6to carry off the smoke from both departments.

lVhat I claim as my invention and desire to secure by Letters Patent isThe movable back plate 6 and top plate 0? containing boiler holesconstructed arranged and combined substantially in the manner and forthe purposes designated.

DAVID JOHNSTON. l/Vitnesses present:

MICHAEL AULT, JAMES MQKENNEY.

